Nut-lock.



T. E. STOGKFORD.

NUT LOOK.

APPLICATION FILED JULY 31, 1911.

1,031,97Q, Patented July 9,1912.

[NVE/VTOR tiara STAB THOMAS E. STOCKFORD, OF WILLIAMS, CALIFORNIA,ASSIGNOR OE ONE-FOURTH TO CHARLES W. BLEVINS AND ONE-FOURTH T0 HENRY H.BETTER, OF WILLIAMS, CALIFORNIA, AND ONE-FOURTH '10 CHARLES E.STOCKFORD, OF SAN LEANDRO,

CALIFORNIA.

NUT-LOCK.

Specification of Letters Patent.

Patented July9, feta Application filed July 31, 1911. Serial No.641,448.

To all whom. it may concern:

Be it known that I, THOMAS E. S/rooK- r'om), a citizen of the UnitedStates, residing at Williams, county of Colusa, State of California,have invented certain new and useful Improvements in Nut-Locks, of whichthe following is a specification, reference being had therein to theaccompanying drawmg.

This invention relates to certain new and useful improvements in nutlocks, the main object being to provide a single-piece nut lock which isespecially adapted to be used in connection with railroad joints wherebyan exceedingly simple and cheaply constructed nut lock is formed whichwill be automatic in operation in order to form a positive lock for thenut after the same has been tightened.

Another object of the invention is to provide a nut look in the form ofa washer having cutting projections formed on its opposite faces adaptedto form grooves in the inner face of the nut and the outer face of thefish plate, said projections being so arranged that substantiallyconcentric grooves will be formed in the respective members, oneprojection forming a groove into which the adjacent projection isadapted to throw a fur- .row'so as to partly fill the groove and preventthe reversing of the nut and washer.

A further object of the invention is to provide a nut lock in which thepairs of cut- Other and further objects and advantages of the inventionwill be hereinafter set forth and the novel features thereof defined bythe appended claims.

In the drawing Figure 1 is a transverse section through a rail jointshowing the application of my improved nut lock; Fig. 2 is a face viewof the fish plate showing the groove formed therein by the cuttingprojections; Fig. 3 is a. detail section through the fish plate, lockwasher and nut; Fig. 4: is a plan view of the lock washer; Fig. 5 is aninner face view of the nut showing the groove formed therein; Fig. 6 isa detail section taken on line 66 of Fig. 7; and Fig. 7 is a sectiontaken on line 7 7 of Fig. 6.

' Like numerals of reference refer tolike parts in the several figuresof the drawing.

In the drawing, 1 indicates a rail, 2 the fish plates, 3 the connectingbolt, 4 the lock washer, and 5 the nut adapted to be locked by saidwasher, the above description being given so that the operation of myimproved nut lock can be readily understood, it, of course, beingunderstood that the same will operate in the same manner when a pliedgolany other member to be fastene by a The washer 4 is preferably formedof pressed steel and upon its opposite faces is provided with oppositelydisposed projections 66 and 7-7, which are preferably formed by punchingthe same outwardly as shown, said projections being substantiallyV-shaped and having two inclined walls terminating in a cutting edge,the rear end of each projection being provided with a vertical wall. Thecutting edges of each pair ofprojections are arrangedto travel indifferent radial paths. The projections 6-6 are arranged at a'greaterdistance from the center than the projections 7--7 in order to cause thesame to travel in different radial paths which will prevent the membersfrom being completely annularly grooved until a complete revolution ismade.

The washer is placed on the bolt against the fish plate as clearly shownin Fig. 1, and as shown, the projections point in a reverse direction tothose on the outer face and the nut is then laced on the bolt andscrewed up tight which causes the washer to be rotated a slight distancethe projections 6 and 7 forming grooves in the faces of the fish plateand nut, respectively. The projections 6 and 7 which are arranged to therear of the projections 6 and 7 and closer to the center of the washerform grooves in the walls of the previously formed grooves, the furrowpassing into the groove so as to partly fill the same and as the grooveis formed in the wall the shape is changed and the wall distorted tosuch an extent that when the nut is reversed, the vertical walls at therear of the projections 6 and 7 abut against the metalforced into thesame and construction, I do. not rely entirely upon the partial fillingof the groove by the .fur-

row but upon distorting the groove in connection with the furrow inordertoprevent the reversing of the nut and I have found experiment that anordinary nut and fish.

b plate inuse upon railroads is formed of such metal that when myimproved lock washer is a plied thereto which is preferlock washer inrespect to the fish plate andably. form of steel, the faces of the memb'ers will be, distorted by the projections m such a manner that afterthe nut has been I screwed up tight, it will be impossible-for i thesame to work loose but-by applym a fin wrench, the same may beunscrewed. allow'sforthe removal of the nut when de sired and bychanging the position of the nut, the same can be used several times in5 forth its merits what this manner before the face has been distortedto such an extent that the lock washer willfailtolock the nut.

Having described m invention and'set claim and desire to secure byLetters Patent is-- '1. A nut lock comprising a washer havingcuttingprojections arranged in pairs adapted to travel in different radialpaths.

2. A lock washer having cutting projections arranged in pairs adapted totravel in difierent radial aths one in advance of the other, saidcutting projections terminating in vertical walls, one gojection of eachpair being adapted to tort the groove formed'by the other projection.

3. A nut lock comprising a washer having pointed cutting project onsarranged in pairs upon its op oslte faces, the projections' on each sideing arranged to travel indifierent radial paths, the projections on asen found that manner.

one side beingarranged reverse to the projections on. the other side.

4. A washer having pointed outlafifisprojectlonsprovided wit verticalrear w arran d ln'pairs, one in,advance of the other, e cuttm .edges ofsaid project1on s belng-arrange to travel in diiferent radial paths,the'forward projection of each pair being adapted to form a groove inthe member to be secured, the rear projection of each pair being adaptedto distort and partly hfill said groove.

5. e combination with a member to be secured and a bolt, of a washerarranged on said bolt, cutting projections formed on the opposite sidesof said washer, said cut ting projections being arranged in pairs, oneprojection of each pair being arranged in advance of its com anionprojection, and a nut working on sai bolt adapted to force saidgrhojections into said member and nut.

6. e combination with an apertured member having a bolt arrangedtherein, a washer arranged on said bolt having pointed projectionsprovided with cutting edges arranged in airs, one in advance of theother, with t e cutting edges arranged to travel in difierent radialpaths, a nut working on. said bolt adapted to be secured by saidprojections 7. The combination with an member ha a nut arrang k rangedon said bolt between said nut and member, said washer being rovi'dedwith cutting projections arrange in airs one in advance of the other anda apted to travel in difierent radial paths, said projections beingadapted I to cut concentric grooves within the member and nut, the rearprojection being adapted to'throw a apertured a bolt arranged therein,of

on said bolt, a washer arfurrow into the groove cut by the forward.

projection.

v In testimony whereof I aflix my signature in presence of twowitnesses. 1

THOMAS n's'r'oononn. Witnesses: W. F. Warmer,

W. R. Tunnnn.

